[ODPILOT]

My radio:  Philco 53-1750
Audio transformer:  32-8242-10
  Specs:  Impedance -  Primary:   4.1K-ohms   Secondary:  3.14 Ohms
             DC resistance:  Primary 435 Ohms    Secondary:     .91 Ohm

This set has been playing nicely for years.  All of a sudden, the volume became is pegged at maximum and turning down the volume control did not lower it at all.  This is true for the radio and the phonograph volumes.   

I unbolted and turned upside down the radio, tapped around and noticed that the green wire (see red arrows) connected to the  volume control were loose as the solder connection had failed.  I re-soldered the wire back on.  While I was in there, I also checked all the electrolyic capacitors as well as their ESR values and they're all good. I also rechecked all the tubes in a tube tester - and they all had good readings with no shorts. 

When I plugged the set back in and turned it on from the volume control, the audio output transformer immediately sizzled and smoked.  Yikes !!   I immediately shut it off and removed the plug.

So - my questions are:
1.  This audio transformer has only 3 wires. There is a black wire at each end, with a reddish wire in the middle.  On one end of the transformer, the black & red wires are right next to each other and the other black wire is further away on the other side (see blue arrows).   To check the transformer impedance and resistance of the primary and secondary -  which two wires am I hooking up to the multimeter to check primary and secondary resistance?  Is it the the black & red next to each other for the primary and then the red and other black for the secondary?
2.  I'm trying to figure out if this problem is just the audio output transformer in the process of burning out OR is it getting the wrong voltage somehow, thereby causing it to fry?
3.  One side of the transformer is puffed out and one side looks normal.
4.  Do I have to remove the audio transformer from the circuit to test the primary & secondary resistance?
4.  Does anyone make a triad audio transformer that I can use to replace this old transformer?

Thanks.  

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